Hp5501B Laser Head Rear Panel Indicators And Connectors; Figure 3-2. Hp5501B Rear Panel Connectors And Indicators - HP 5501B Operating And Service Manual

3-8.

HP5501B LASER HEAD REAR PANEL INDICATORS AND CONNECTORS

A TILDE ("~") PRECEDING A SIGNAL NAME INDICATES NEGATIVE-
TRUE LOGIC LEVELS.
3-9. Following are descriptions of the HP5501B rear panel features shown in Figure 3-2.
2. +15V SUPPLY
UNBALANCE
3. -15V SUPPLY
UNBALANCE

Figure 3-2. HP5501B Rear Panel Connectors and Indicators

NOTE
RED LED lights if the ±15V input voltages are unbalanced
LED in the positive direction by one Volt or more. For
example:
When the positive supply measures +16 Volts (or
more positive) and the negative supply remains at -
15 Volts.
When the positive supply measures +15 Volts and
the negative supply is -14 Volts (or less negative).
RED LED lights if the ±15V input voltages are unbalanced
LED in the negative direction by one Volt or more. For
example:
When the negative supply measures -16 Volts (or
more negative) and the positive supply remains at
+15 Volts.
When the negative supply measures -15 Volts and
the positive supply is +14 Volts (or less positive).
Both ±15V SUPPLY UNBALANCE LED's light if the
TEST-NORM switch (A1S2) is in NORM position with
cover off or in TEST with cover on.
HP5501B
Operation
3-11