HP 4934A - Dialing with a Butt-in

Dialing using the HP 4934A and a Butt-in
1 Connect the butt-in to the T and R DIAL binding posts.
2 Connect the test circuit to the TRMT port.
3 Select DIAL to connect the butt-in through to the TRMT port. The DIAL
indicator will light.
4 Dial up the line you want using the butt-in.
5 When the far end goes off-hook you can use the butt-in for voice communication.
6 To continue to hold the line and connect the HP 4934A transmitter to it, select
TRMT HOLD then DIAL. You can now transmit test signals along the line. To
re-establish the speech path, press DIAL. To drop the line, press TRMT HOLD.
7 Alternatively, to continue to hold the line and connect the HP 4934A receiver to
it, select RCV HOLD then REVERSE. You can now receive test signals from the
line. To re-establish the speech path, press REVERSE and DIAL. To drop the
line, press RCV HOLD.
Making Measurements 2-3