Pulsar TCF-10B, Системное руководство, Страница: 216 / 249

1. Remote Handset Configuration
Cradle a handset without a push-to-talk switch
on a hookswitch assembly in a location
remote from the TCF–10B Voice Adapter
Module. Connect the hookswitch assembly in
series with the alarm circuit, as well as to the
TCF–10B rear panel terminal block TB5 (see
Figure 18-4 and Figure 18-5).
Install a separate calling pushbutton in the
remote location, near the handset.
Initiate signaling at the remote location by
lifting the handset from the hookswitch
assembly and pressing the calling pushbutton.
2. Local Handset Configuration
Plug a handset without a push-to-talk switch
into the front panel “HANDSET” jack of the
Voice Adapter Module.
Connect the alarm circuit per Figure 18-4 and
Figure 18-5.
Initiate signaling by plugging the handset into the
module assembly and pressing the calling push-
button on the Voice Adapter (see Figure 1-1,
“Calling PB”).
If a handset with a Push-to-Talk switch is used in
either configuration (above), you initiate
signalling by lifting the handset from the hook-
switch assembly and pressing the Push-to-Talk
switch and the Calling pushbutton simultaneously.
18.1.3 Electrical Characteristics
The Voice Adapter Module’s electrical character-
istics are shown in Table 18-1.
Page 18–2 April 1997
TCF–10B System Manual
Technologies, Inc.
Operating Temp Range -20° to +60° C (Ambient)
Audio Frequency Response 300 to 2,000 Hz (-3 dB)
Receiver Sensitivity -74 dBm (50 ohm)
AGC Dynamic Range 40 dB min Audio output ± 0.5. DB for R.F. level change -74 dBm
to -34 dBm
Compandor Jumper selectable (IN/OUT)
TCF Signaling Tone 370 Hz ±50 Hz
TCF Signaling Tone 370 Hz ± 50 Hz
Detector
Transmit Audio 3.2 Vp-p (in limit) into 600 ohm
Receive Audio Squelch When RF input is below -80 dBm (Also jumper selectable to
squelch with “push-to-talk” switch)
Powering Module powered from +20 V, common, and -20 V power supply.
Supply current is approximately 50 mA from each supply.
External Handset & Must meet IEEE impulse and IEEE SWC tests (ANS C37.90.1).
Signaling Inputs
Alarm Terminals Must pass 2,500 Vdc hi-pot for one minute (normal open/normal
closed, jumper selectable).
Table 18–1. Voice Adapter Module Electrical Characteristics.