Product Support
This page provides support for individual products by experienced RTS Digital Matrix Intercom technicians.
- What are the technical ingredients of a TW system?
- • Power:
A system should consume 70-80% maximum of the total power available.
• Termination
Each line should be terminated once, watch for double termination or no termination at all.
1. If a system power supply is used (PS-15 or PS-31), the power supply has a built-in impedance generator that provides the system with the necessary audio termination.
2. The 800 series models are independently powered (wall pack) and need a termination plug with 600? load for each line (channel)
3. Independent units such as the MCE-325 (plugs directly into the AC main line) need to be terminated with 200? load for each line (channel)
• Cabling:
Use twisted pairs preferably shielded with the shield connected to ground (dead shield)
• AC line noise:
In an environment that has computers, lights (especially Neon) and other appliances such as UPS units, it is possible that the AC line will have low frequency noise that will be coupled through the power supply on the units with local power (wall packs). It is advisable to connect the AC line to a low noise power strip and connect the intercom wall pack to that power strip.
• Call Light Cross Talk:
Every foot of cable equals almost 30PF of capacitance, depending on the length and type of cable. It sometimes creates a high-frequency (call light) cross talk (when the user calls CH #1, the second user gets CH #1 and CH #2 flashing). To correct the high-frequency (20 kHz) impedance, plug the capacitance termination plug shown in figure 1 to the end of your line.
Figure 1
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- What are the technical ingredients of a TW system?
- • Power:
A system should consume 70-80% maximum of the total power available.
• Termination
Each line should be terminated once, watch for double termination or no termination at all.
1. If a system power supply is used (PS-15 or PS-31), the power supply has a built-in impedance generator that provides the system with the necessary audio termination.
2. The 800 series models are independently powered (wall pack) and need a termination plug with 600? load for each line (channel)
3. Independent units such as the MCE-325 (plugs directly into the AC main line) need to be terminated with 200? load for each line (channel)
• Cabling:
Use twisted pairs preferably shielded with the shield connected to ground (dead shield)
• AC line noise:
In an environment that has computers, lights (especially Neon) and other appliances such as UPS units, it is possible that the AC line will have low frequency noise that will be coupled through the power supply on the units with local power (wall packs). It is advisable to connect the AC line to a low noise power strip and connect the intercom wall pack to that power strip.
• Call Light Cross Talk:
Every foot of cable equals almost 30PF of capacitance, depending on the length and type of cable. It sometimes creates a high-frequency (call light) cross talk (when the user calls CH #1, the second user gets CH #1 and CH #2 flashing). To correct the high-frequency (20 kHz) impedance, plug the capacitance termination plug shown in figure 1 to the end of your line.
Figure 1
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- What if I cannot hear channel 2 on an MCE-325?
- The MCE-325 needs to be in Mono Mode when using a single-sided headset.
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- How can I double the power of a RTS PS-15 power supply?
- • Use a ¼-inch stereo cable to connect J3 on the back panel of the PS-15 #1 to J3 on the back panel of PS-15 #2 (to couple the audio)
• Turn the Impedance Select switch on each power supply to Dual position (to return the audio impedance to 200?)
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- How can I interface RTS TW to a telephone line?
- • Four-Wire telephone, use the RTS Model SSA-324
• Two-Wire Telephone, use the RTS Model TWI-222T
• Telephone with dial, busy signal and hybrid use Telos link.
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- How can I interface RTS TW to Clear-Com Systems?
- • Direct audio interface (pins 1 & 3 of Clear-Com® to 1 & 3 RTS® ch#2).
• Call signal will be interfaced through the Model SSA-324
• Clear-Com does not have Mic-Off mode
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- How can I interface RTS TW to RTS Four-Wire Systems?
- • The RTS Model SSA-324 interface system provides two-wire (RTS and Audiocom) to four-wire interface with nulling controls and gain adjust to and from the RTS TW line.
• The Model SSA-324 Call Option Card interfaces RTS and Audiocom call signal to relay contact to be used with the four-wire system and two-way radio.
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- How can I interface RTS TW to Clear-Com Systems?
- • Direct audio interface (pins 1 & 3 of Clear-Com to 1 & 3 RTS ch#2).
• Call signal will be interfaced through the Model SSA-324
• Clear-Com does not have Mic-Off mode
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