17 Jun
1997
17 Jun
'97
6:54 p.m.
On Tue, 17 Jun 1997, Marvin wrote:
I have another strange device. This one is called a
Channel Tester,
Ser. No. 55263, and a date of 1985-4. It has a series of BNC connectors
on the face labeled "Tx Audio", "RX Audio", "Spk",
"Voice Tx Test",
"Voice Rx Test", "Mod", "Disc", "RSSI", "NRZ
Data", and "Bit CLock". I
got it attached to an NEC PC 8201A (as I recall) TRS-80 Model 100
clone. It also has a male and female Centronix interface plugs on the
side away from where it attaches to the 8201A. Does anyone have any
idea what this thing is? Thanks!
Are they 50 pin Centronics? If they are, it could be a telephone tester.
The Centronics port (at 50 pins) would take a "whip" and let you test
all the lines on a PBX or straight telephone cable.
If they are 36 pin Centronics I really don't know what used NRZ encoding
in the early 80's except tape drives - or maybe its a tester for a radio
land line from studio to tramsmitter - it does have the Mod-ulation BNC
connection.
Other than that - I'm stumped 8-) Who made it - NEC?
BC