Hi Can any body help me with some set up information for a motorola compa 2 base station High band VHF.
I'm after information on how to adjust the reciever hysteresis and info on the landline audio paths.
Any help would be great
Thanks wookie
Motorla Compa 2 Base stations
Moderator: Queue Moderator
Copma 2
As far as I know it's a Micor. But I could be wrong.
My two bits worth:
Please provide the exact model number, as well as what you wish to accomplish.
Do you have the service manuals?
Compa refers to the radio enclosure, which in this case is like a small file cabinet.
The line out level is located on the line driver module.
I am very familiar with all of the older USA models.
Please provide the exact model number, as well as what you wish to accomplish.
Do you have the service manuals?
Compa refers to the radio enclosure, which in this case is like a small file cabinet.
The line out level is located on the line driver module.
I am very familiar with all of the older USA models.
Aloha, Bernie
The Model Number is: MAC43RCM1206BT
And i have a copy of service manual: 68P84824D57-1
I am trying to set this repeater up for operation. But i dont have a station metering and intercom unit.
I need help with the adjusting reciever hysteresis.
And also wheather the station has a reverse guard tone feature like some newer motorola repeaters like the CQF9000 with the SMS TRC boards fitted.
If this is not possible i have a 2325Hz Oscillator with can be switch either high or low, which i'm planning to insert in the RX audio path before the line matching transformers. To provide the 2325 reverse guard tone when the reciever is closed.
Thanks
wookie
And i have a copy of service manual: 68P84824D57-1
I am trying to set this repeater up for operation. But i dont have a station metering and intercom unit.
I need help with the adjusting reciever hysteresis.
And also wheather the station has a reverse guard tone feature like some newer motorola repeaters like the CQF9000 with the SMS TRC boards fitted.
If this is not possible i have a 2325Hz Oscillator with can be switch either high or low, which i'm planning to insert in the RX audio path before the line matching transformers. To provide the 2325 reverse guard tone when the reciever is closed.
Thanks
wookie
Wookie:
I suspect that this unit was made for the UK market.
I can't find any reference to your model number.
Motorola had a factory in UK, perhaps it is made up of US modules, or it may be unique to your market.
The rules& regulations in UK may require a model specific to your market.
I never heard of a "hysteresis" adjustment.
Assuming that this is a MICOR, the receiver squelch IC (Audio squelch IC U202) determines wether the signal is full (20DB) quieting or not, if the signal is full quieting the squelch closes immediatly, if the signal is less than 20DBQ the receiver has a long shut off time to allow for fluttering signals. This is not adjustable.
Your model number indicates "Carrier squelch" If this station is equipped with Motorola 'Private line" the PL decoder controls the receiver squelch.
"Reverse Guard tone??"(Status Tone?) Your description sounds as if the application is for Spectra Tac voting system.
This is a 2175, or alternate tone 1900 HZ encoder which signals the voting comparator, or other equipment that the receiver is squelched.
The tone level is usuially set 13DBM0 for Rev B SQM modules.
This level is quite critical, since the SQM (Signal quality module in the Spectra-Tac comparitor) sets the AGC on this tone.
The reason for the HI-LOW switches is to provide test tones for equalising the wire line frequency response.
The line driver module, which is unique to Spectra-Tac applications has jumpers for this purpose.
A "Squelch Gate" module is required to make this station into a repeater,
or some sort of external controller can be fitted.
In any case the minimum modules in the card cage is:
Station control, And at least one Guard Tone decoder, Squelch Gate, or DC transfer. This is to provide the ground (earth) to the transmit channel element.
If you intend to use receiver voting you need the Status tone encoder, as well as the Spectra tac line driver.
It is possible to use the normal line driver with modifications if line equalisation is not necessary, such as if the comparator is co-located, or if your circuits are "flat", such as a Microwave system.
I havs some Micor parts, as well as a test set. Getting them to you may well cost more than they are worth.
I suspect that this unit was made for the UK market.
I can't find any reference to your model number.
Motorola had a factory in UK, perhaps it is made up of US modules, or it may be unique to your market.
The rules& regulations in UK may require a model specific to your market.
I never heard of a "hysteresis" adjustment.
Assuming that this is a MICOR, the receiver squelch IC (Audio squelch IC U202) determines wether the signal is full (20DB) quieting or not, if the signal is full quieting the squelch closes immediatly, if the signal is less than 20DBQ the receiver has a long shut off time to allow for fluttering signals. This is not adjustable.
Your model number indicates "Carrier squelch" If this station is equipped with Motorola 'Private line" the PL decoder controls the receiver squelch.
"Reverse Guard tone??"(Status Tone?) Your description sounds as if the application is for Spectra Tac voting system.
This is a 2175, or alternate tone 1900 HZ encoder which signals the voting comparator, or other equipment that the receiver is squelched.
The tone level is usuially set 13DBM0 for Rev B SQM modules.
This level is quite critical, since the SQM (Signal quality module in the Spectra-Tac comparitor) sets the AGC on this tone.
The reason for the HI-LOW switches is to provide test tones for equalising the wire line frequency response.
The line driver module, which is unique to Spectra-Tac applications has jumpers for this purpose.
A "Squelch Gate" module is required to make this station into a repeater,
or some sort of external controller can be fitted.
In any case the minimum modules in the card cage is:
Station control, And at least one Guard Tone decoder, Squelch Gate, or DC transfer. This is to provide the ground (earth) to the transmit channel element.
If you intend to use receiver voting you need the Status tone encoder, as well as the Spectra tac line driver.
It is possible to use the normal line driver with modifications if line equalisation is not necessary, such as if the comparator is co-located, or if your circuits are "flat", such as a Microwave system.
I havs some Micor parts, as well as a test set. Getting them to you may well cost more than they are worth.
Aloha, Bernie