IET Labs, Inc. RLC Digibridge 1693, User And Service Manual, Page: 29 / 171

5
1693 RLC Digibridge
Introduction
Figure 1-4: Rear controls and connectors on 1693 Digibridge
Reference Name Description Function
1
EXTERNAL BIAS
Connector
Connector, 2 pins, labeled 60V max, 200mA
max, + -.
For External Bias supply. Optional cable available 1658-
2450. Cable comes with a fuse (2/10 A, 250V, 3AG type, fast
blow).
2
TALK switch* Toggle switch Selection of mode of IEEE-488 interface: TALK/LISTEN or
TALK ONLY as labeled.
3
Power Connector Shrouded 3-wire receptable labeled 90-
250VAC, 50-60 Hz, 60W MAX.
AC power input
4
Fuse Fuse in power input module drawer (6/10 A,
250V, 5x20mm, slow blow)
Short-circuit protection. Replace only with the same rating.
To replace, press up on the release tab to remove fuse
drawer.
5
Side Vent Air passage Ventilation
6
RS-232 Interface RS-232 Interface for updating firmware of
IEEE Card
Firmware can be updated using standard RS232 cable and
software from IET.
7
IEEE-488 Interface
connector
Socket, 24-pin. Received IEEE-488 interface
cable.
Input/Output connections according to IEEE-488 standard.
Functions: complete remote control. Output of selected
results with or without PC.
8
Vent Air passage Ventilation
Not shown
Internal Fuse 1/4 A, plug-in type, sub-miniature, quick acting. Protects instrument circuitry from damage by charged
capacitors.
*TALK switch and IEEE connectors are supplied with the IEEE interface option only. Otherwise blank panel is installed.
Table 1-2: Rear controls and connectors
1 2
3 4 5
6 7 8