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Faq Question
How do I reprogram the frequencies in my Solo, Duo or Trio talkback units? 
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I am trying to reprogram my DUO and I cannot read back from it with an attached dongle cable. 
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What is the wiring of the SOLO, DUO and TRIO frequency programming dongles. I want to make my own. 
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We have recently purchased the Duo intercom system with ASL HS-1/D headphones. Is the sound level produced by the headphones limited a particular level? We normally have our talkback headphones limited at 88dB. 
View Full
I am looking for a multi-channel wide area wireless studio talkback solution to cover areas outside of the studio – dressing rooms, ‘Green rooms’, corridors, audience reception areas etc.  
View Full
What do you mean by ‘normal audio’ and ‘extended audio’ with regard to radio modules? 
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I bought a few SOLO receivers some time ago. One of them seems to have a problem and I cannot get it to work. When I switch on, all the channel/status lights are illuminated. Please can you help? 
View Full
I am using the Duo Talkback unit in a new studio which is a lot noisier than the last one. I am having a problem with the audio level. Is it possible to adjust the Audio level in the Duo to give me more volume? 
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How many analogue Insight video links can be used on a small site? 
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What are the main differences between Insight analogue and digital links? 
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I have a PTZ camera control application. How can I configure and wire my ORIONs to work RS485. 
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I have an Insight digital video system. I bought it a few years ago and it has been working well up until now. I suspect that the decoder is faulty. I looked at the label on the unit which states that it is an Antrica model 3100. Please can I purchase a new unit? 
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What are the factory default IP addresses for my Insight digital CCTV wireless link? 
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Could you please tell me which PTZ control protocols the insight digital CCTV video link supports? 
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I have recently bought an Insight analogue video link. I have tried to connect the unit through a POE adapter and it will not power up. Please can you advise. 
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What is an antenna ground plane? 
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Aerials, antennas and antennae? What is the correct terminology? 
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What is the difference between full duplex, half duplex and simplex operation with radio modems. 
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USB to RS232 serial convertor problems. I cannot get your software to connect.  
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What is the difference between channel steps and channel bandwidth? 
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Why do I measure a dead short across my antenna system? 
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I have recently upgraded my PC and have been trying to load some of the W&D software which used to work on my old PC My new PC has Windows 7 operating system installed but I have noticed it is a 64-bit machine. Should the W&D software still work on the new PC? 
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I need to link some on/off digital inputs wirelessly across a site. What W&D product should I look at? 
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How can I transfer meter pulses across a site to a central monitoring point? 
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How does the W&D 200T-RM differ from the 200T-DI? 
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I am a first-time purchaser of radio modems. What accessories should I order to help me get started? 
View Full
The ORION programming cable (01146 0202 A) has an RJ45 to DB9F adaptor. What wiring is inside it?  
View Full
I have just bought a couple of ORION radio modems and have not used them before. How do I easily configure them to work together? 
View Full
How do I wire to an ORION digital output? 
View Full
I need low battery consumption for my telemetry application. I have a solar-charged battery supply. Do your modules have a ‘sleep’ function? 
View Full
I am using a radio telemetry link, which up until recently has been working well. The link has become very noisy with interference and at times not useable. I am using Yagi antennas on both the transmitter and receiver and they are vertically polarised. How can I improve the link quality without having to change frequencies? The whole band seems to be full. 
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I am using a radio telemetry link but the interference has increased recently. I have monitored the 458Mhz licence-exempt band and noticed that 2 frequencies seem to be clear of interference. The 2 frequencies are 458.825Mhz and 458.900Mhz. Can I use these frequencies? 
View Full
What is the difference between a radio telemetry module and a radio modem? 
View Full
What is the highest over-air data rate modem that you supply? 
View Full
What is the easiest way to line up a yagi antenna. I am using ER450 radio modems. 
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The first character in my transmitted message is corrupted. After keying the transmitter module do I need to pause before I input my data and if so, for how long?  
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What is the difference between receiver sensitivity and receiver selectivity? 
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The SR500 receiver module has a data slicer output. What is it used for? 
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I am replacing the 3 magnetic sensors at the end of the booms on the Filtration tanks. The sensors and wiring has corroded over time. The cost of replacing the wiring back to my office is very expensive, do you have a solution? 
View Full
I am an owner of a narrow boat. During the winter months I moor the boat along-side the river bank. It is fitted with a basic alarm. Is there a way that I am able to monitor the alarms from my house. I do have mobile phone coverage from the narrow-boat. 
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I have been using non rechargeable penlight batteries to power my radio and would now like to use rechargeable batteries to keep down the costs. The battery holder takes 8 batteries. When I installed the new rechargeable batteries in the holder the radio would not power up. Please can you advise?  
View Full
I have a PACSCOM3000 telemetry system which was installed many years ago. The power supply on one of the remote units appears to be faulty and I would like to purchase a replacement power supply with the battery backup.  
View Full
What is receiver ‘blocking’? 
View Full
What is ‘fade margin’? 
View Full
I am installing a CCTV system around an industrial site. I have looked on your website and have found your INSIGHT digital CCTV system. I have noticed that this system is for use with Analogue cameras. Will it work using IP cameras? 
View Full
I am looking for a data link that can be used as a backup for my servers. I have a building across a road which houses my servers and this is connected by cable to my office. I am a little worried that if I have a cable fault, I will lose communications with the servers. Can you suggest a solution? 
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How do I choose what type of coaxial cable to use? 
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What are typical coaxial cable losses? 
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I am using 2 Orion modems which seem to have stopped working. There are 3 indicator lights on the front which appear to be flashing randomly. Can you tell me what the lights indicate? 
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What communications protocols does the OpenNET MAX support over Ethernet? The spec sheet says  
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I am looking for an RF power meter to measure low transmit power levels from VHF and UHF telemetry transmitters? 
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Why am I getting a FLASH CHECKSUM ERROR when I try to write parameter changes to my ORION radio unit? 
View Full
The LCD display on my Symphony talkback base is blank after someone fiddled with it. What can I do? 
View Full
The maximum e.i.r.p. on the UK 458MHz deregulated band is 500mW. Why would I ever want to use a directional antenna and have to turn my TX power down? 
View Full
The power connector on my ORION has a poor connection and is intermittent. Does it need to be returned for service? 
View Full
I have been using Wood and Douglas Talk back equipment in the 800Mhz band. I received a letter from OFCOM telling me that this frequency band is being used for the new services and I will have to get the talkback equipment retuned. Can you advise? 
View Full
Polled Networks  
View Full
I have a Talk–back unit model PD600D which I purchased several years ago. I would like to change frequencies so that I can use it in an OB vehicle I have. I have attached a photo of the transmitter module which is made by W&D. Can you give me some information on this model? 
View Full
Can you please let me have the pin out for the 5pin LEMO audio connector on the DUO talk-back transceiver? 
View Full
DUO wireless talkback units can work with headsets that have either a dynamic or an electret (condenser) microphone. What is the difference between dynamic and electret microphones? 
View Full
What are the pinout details for the Lemo connector on an old W&D UR450 talkback receiver? 
View Full
Can I operate the ORION’s ‘modem enable/disable’ pin directly from a microcontroller’s output? 
View Full
What is the difference between MPT1411 and MPT 1329 standards? 
View Full
Fitting instructions for N-type coaxial connector 
View Full
What is ‘Radio Horizon’ and how is it calculated? 
View Full
What are the UK 458MHz unlicensed telemetry band channel frequencies? 
View Full
I need to mount a mast on the side of a building. Can you let me have details of how I can do this? 
View Full
I need to mount an antenna mast next to a kiosk. Can you give me details of how I can do this? 
View Full
How do I change the operating frequency of an OpenNet 6000 system? 
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I need to send GE Fenuc SNP data with break signals over a radio link. Is this possible? 
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I have an Orion Radio modem with RJ45 I/O sockets. How can I connect these to my sensors? 
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I have recently installed a Wood & Douglas 300T Telemetry Radio on one of my Sites. I have connected the inputs to the unit but it does not appear to do anything. Please can you help? 
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I run inter-substation VF protection relay links on BT landlines. As part of its CN21 program, BT is removing support for copper lines and wants us to move to an IP connection. This is no good. We need fixed latency not available with an IP network. Do you have a point-to-point radio solution that we could use?  
View Full
What is a leaky feeder? 
View Full
I have recently purchased an Insight Analogue CCTV link but found that I am losing colour on the receive monitor. I have adjusted the monitor and checked all the connections on the system. Is there anything I can do to get the colour back? 
View Full
A large number of today’s telemetry devices use an RS232 interface to communicate with an industrial computer. The problem with using RS232 is that there is a limitation to the distance between the device and the computer, generally about 15 meters. How do we overcome this? 
View Full
I have recently acquired a Wood and Douglas SLK460T Broadcast transmitter. On the front panel is a High/Low setting on a rotary switch but no matter where this switch is I am only getting 500mw on the antenna. Please can you advise what the output power is for this unit and how I can get it to transmit on a higher power? 
View Full
What does VSWR stand for and why is it so important when dealing with Antennas? 
View Full
Can I reconfigure my E-series radios over Ethernet rather than using the System Port serial connection?  
View Full
When should I change the back-up battery in my Wood & Douglas PacsNet equipment?  
View Full
The power supply in my Symphony base station has failed. Can you supply a replacement?  
View Full
What size are the ORION radio modem TX and RX data buffers?  
View Full
I have been sent the programming software for one of your products. When I try to use it I get problems and some strange messages on my screen I am using Windows 7 on my PC. Can you suggest a solution? 
View Full
I would like to replace the rotation sensors on my Filtration tanks. I have looked at using your 200T/RM’s but think I might have a problem with them. 2 of the arms rotate clockwise and 1 rotates counter-clockwise will they work on all the tanks? 
View Full
Now that it is coming in to the winter months, can ice forming on the antenna cause problems for a radio link? 
View Full
I have a Wood and Douglas 3500 controller which has gone faulty. I have been quoted an OpenNet6000 controller as a replacement. Will my existing I/O cards work with this controller? 
View Full
What is type approval and why is it needed? 
View Full
I am being told that I must move my talkback frequencies. How far can I tune away from my original SOLO, DUO and TRIO channels? 
View Full
What is a “null modem cable”? 
View Full
What is the difference between a “Null modem cable” and a straight through cable? 
View Full
How do I weatherproof coaxial connectors? 
View Full
What is a centre-fed dipole and what is an end-fed dipole? 
View Full
DATA
Data
FAQ Question
I need to link some on/off digital inputs wirelessly across a site. What W&D product should I look at? 
View Product
How can I transfer meter pulses across a site to a central monitoring point? 
View Product
How does the W&D 200T-RM differ from the 200T-DI? 
View Product
I am a first-time purchaser of radio modems. What accessories should I order to help me get started? 
View Product
The ORION programming cable (01146 0202 A) has an RJ45 to DB9F adaptor. What wiring is inside it?  
View Product
I have just bought a couple of ORION radio modems and have not used them before. How do I easily configure them to work together? 
View Product
How do I wire to an ORION digital output? 
View Product
I need low battery consumption for my telemetry application. I have a solar-charged battery supply. Do your modules have a ‘sleep’ function? 
View Product
I am using a radio telemetry link, which up until recently has been working well. The link has become very noisy with interference and at times not useable. I am using Yagi antennas on both the transmitter and receiver and they are vertically polarised. How can I improve the link quality without having to change frequencies? The whole band seems to be full. 
View Product
I am using a radio telemetry link but the interference has increased recently. I have monitored the 458Mhz licence-exempt band and noticed that 2 frequencies seem to be clear of interference. The 2 frequencies are 458.825Mhz and 458.900Mhz. Can I use these frequencies? 
View Product
What is the difference between a radio telemetry module and a radio modem? 
View Product
What is the highest over-air data rate modem that you supply? 
View Product
What is the easiest way to line up a yagi antenna. I am using ER450 radio modems. 
View Product
The first character in my transmitted message is corrupted. After keying the transmitter module do I need to pause before I input my data and if so, for how long?  
View Product
What is the difference between receiver sensitivity and receiver selectivity? 
View Product
The SR500 receiver module has a data slicer output. What is it used for? 
View Product
I am replacing the 3 magnetic sensors at the end of the booms on the Filtration tanks. The sensors and wiring has corroded over time. The cost of replacing the wiring back to my office is very expensive, do you have a solution? 
View Product
I have a PACSCOM3000 telemetry system which was installed many years ago. The power supply on one of the remote units appears to be faulty and I would like to purchase a replacement power supply with the battery backup.  
View Product
I am looking for a data link that can be used as a backup for my servers. I have a building across a road which houses my servers and this is connected by cable to my office. I am a little worried that if I have a cable fault, I will lose communications with the servers. Can you suggest a solution? 
View Product
I am using 2 Orion modems which seem to have stopped working. There are 3 indicator lights on the front which appear to be flashing randomly. Can you tell me what the lights indicate? 
View Product
What communications protocols does the OpenNET MAX support over Ethernet? The spec sheet says  
View Product
Why am I getting a FLASH CHECKSUM ERROR when I try to write parameter changes to my ORION radio unit? 
View Product
The power connector on my ORION has a poor connection and is intermittent. Does it need to be returned for service? 
View Product
Can I operate the ORION’s ‘modem enable/disable’ pin directly from a microcontroller’s output? 
View Product
What is the difference between MPT1411 and MPT 1329 standards? 
View Product
Fitting instructions for N-type coaxial connector 
View Product
How do I change the operating frequency of an OpenNet 6000 system? 
View Product
I run inter-substation VF protection relay links on BT landlines. As part of its CN21 program, BT is removing support for copper lines and wants us to move to an IP connection. This is no good. We need fixed latency not available with an IP network. Do you have a point-to-point radio solution that we could use?  
View Product
Can I reconfigure my E-series radios over Ethernet rather than using the System Port serial connection?  
View Product
When should I change the back-up battery in my Wood & Douglas PacsNet equipment?  
View Product
What size are the ORION radio modem TX and RX data buffers?  
View Product
I would like to replace the rotation sensors on my Filtration tanks. I have looked at using your 200T/RM’s but think I might have a problem with them. 2 of the arms rotate clockwise and 1 rotates counter-clockwise will they work on all the tanks? 
View Product
VOICE
Voice
FAQ Question
How do I reprogram the frequencies in my Solo, Duo or Trio talkback units? 
View Product
I am trying to reprogram my DUO and I cannot read back from it with an attached dongle cable. 
View Product
What is the wiring of the SOLO, DUO and TRIO frequency programming dongles. I want to make my own. 
View Product
We have recently purchased the Duo intercom system with ASL HS-1/D headphones. Is the sound level produced by the headphones limited a particular level? We normally have our talkback headphones limited at 88dB. 
View Product
I am looking for a multi-channel wide area wireless studio talkback solution to cover areas outside of the studio – dressing rooms, ‘Green rooms’, corridors, audience reception areas etc.  
View Product
What do you mean by ‘normal audio’ and ‘extended audio’ with regard to radio modules? 
View Product
I bought a few SOLO receivers some time ago. One of them seems to have a problem and I cannot get it to work. When I switch on, all the channel/status lights are illuminated. Please can you help? 
View Product
I am using the Duo Talkback unit in a new studio which is a lot noisier than the last one. I am having a problem with the audio level. Is it possible to adjust the Audio level in the Duo to give me more volume? 
View Product
The LCD display on my Symphony talkback base is blank after someone fiddled with it. What can I do? 
View Product
I have been using Wood and Douglas Talk back equipment in the 800Mhz band. I received a letter from OFCOM telling me that this frequency band is being used for the new services and I will have to get the talkback equipment retuned. Can you advise? 
View Product
I have a Talk–back unit model PD600D which I purchased several years ago. I would like to change frequencies so that I can use it in an OB vehicle I have. I have attached a photo of the transmitter module which is made by W&D. Can you give me some information on this model? 
View Product
Can you please let me have the pin out for the 5pin LEMO audio connector on the DUO talk-back transceiver? 
View Product
DUO wireless talkback units can work with headsets that have either a dynamic or an electret (condenser) microphone. What is the difference between dynamic and electret microphones? 
View Product
What are the pinout details for the Lemo connector on an old W&D UR450 talkback receiver? 
View Product
I have recently acquired a Wood and Douglas SLK460T Broadcast transmitter. On the front panel is a High/Low setting on a rotary switch but no matter where this switch is I am only getting 500mw on the antenna. Please can you advise what the output power is for this unit and how I can get it to transmit on a higher power? 
View Product
The power supply in my Symphony base station has failed. Can you supply a replacement?  
View Product
I am being told that I must move my talkback frequencies. How far can I tune away from my original SOLO, DUO and TRIO channels? 
View Product
VIDEO
Video
FAQ Question
How many analogue Insight video links can be used on a small site? 
View Product
What are the main differences between Insight analogue and digital links? 
View Product
I have a PTZ camera control application. How can I configure and wire my ORIONs to work RS485. 
View Product
I have an Insight digital video system. I bought it a few years ago and it has been working well up until now. I suspect that the decoder is faulty. I looked at the label on the unit which states that it is an Antrica model 3100. Please can I purchase a new unit? 
View Product
What are the factory default IP addresses for my Insight digital CCTV wireless link? 
View Product
Could you please tell me which PTZ control protocols the insight digital CCTV video link supports? 
View Product
I am installing a CCTV system around an industrial site. I have looked on your website and have found your INSIGHT digital CCTV system. I have noticed that this system is for use with Analogue cameras. Will it work using IP cameras? 
View Product
I have recently purchased an Insight Analogue CCTV link but found that I am losing colour on the receive monitor. I have adjusted the monitor and checked all the connections on the system. Is there anything I can do to get the colour back? 
View Product
MISC
Custom
FAQ Question
What is an antenna ground plane? 
View Product
Aerials, antennas and antennae? What is the correct terminology? 
View Product
What is the difference between full duplex, half duplex and simplex operation with radio modems. 
View Product
USB to RS232 serial convertor problems. I cannot get your software to connect.  
View Product
What is the difference between channel steps and channel bandwidth? 
View Product
Why do I measure a dead short across my antenna system? 
View Product
I have been using non rechargeable penlight batteries to power my radio and would now like to use rechargeable batteries to keep down the costs. The battery holder takes 8 batteries. When I installed the new rechargeable batteries in the holder the radio would not power up. Please can you advise?  
View Product
What is receiver ‘blocking’? 
View Product
What is ‘fade margin’? 
View Product
How do I choose what type of coaxial cable to use? 
View Product
What are typical coaxial cable losses? 
View Product
I am looking for an RF power meter to measure low transmit power levels from VHF and UHF telemetry transmitters? 
View Product
The maximum e.i.r.p. on the UK 458MHz deregulated band is 500mW. Why would I ever want to use a directional antenna and have to turn my TX power down? 
View Product
Polled Networks  
View Product
What is ‘Radio Horizon’ and how is it calculated? 
View Product
What are the UK 458MHz unlicensed telemetry band channel frequencies? 
View Product
I need to mount a mast on the side of a building. Can you let me have details of how I can do this? 
View Product
I need to mount an antenna mast next to a kiosk. Can you give me details of how I can do this? 
View Product
What is a leaky feeder? 
View Product
A large number of today’s telemetry devices use an RS232 interface to communicate with an industrial computer. The problem with using RS232 is that there is a limitation to the distance between the device and the computer, generally about 15 meters. How do we overcome this? 
View Product
What does VSWR stand for and why is it so important when dealing with Antennas? 
View Product
I have been sent the programming software for one of your products. When I try to use it I get problems and some strange messages on my screen I am using Windows 7 on my PC. Can you suggest a solution? 
View Product
Now that it is coming in to the winter months, can ice forming on the antenna cause problems for a radio link? 
View Product
I have a Wood and Douglas 3500 controller which has gone faulty. I have been quoted an OpenNet6000 controller as a replacement. Will my existing I/O cards work with this controller? 
View Product
What is type approval and why is it needed? 
View Product
What is a “null modem cable”? 
View Product
What is the difference between a “Null modem cable” and a straight through cable? 
View Product
How do I weatherproof coaxial connectors? 
View Product
What is a centre-fed dipole and what is an end-fed dipole? 
View Product

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