HP 3457A Service Manual page 29

3457A
Table 1-1. Specifications
PLUG-IN OPTION
44491A Armature Relay Multiplexer Assembly (Cont'd)
General Information
DC ISOLATION:
Channels 0 - 7 (40°C, 95% Relative Humidity) 10*° Ohms
Channels 8 and 9 (40°C, 95% Relative Humidity) 10° Ohms
Channels 0 - 7 (40°C, 60% Relative Humidity) 10** Ohms
Channels 8 and 9 (40°C, 60% Relative Humidity) 10*° Ohms
ISOLATION:
Channels 0 - 7 Closed: 150 pF
Channels 0 - 7 Open: 10 pF
LO to Chassis: 420 pF
PLUG-IN OPTION
44492A Reed Relay Multiplexer Assembly
INPUT CHARACTERISTICS:
Ten two-wire reed relay channels.
MAXIMUM VOLTAGE: (Terminal to Terminal or Terminal to Chassis)
125 volts peak to peak.
THERMAL OFFSET:
3 microvolts.
RELAY LIFE:
107 operations at maximum load (125 VAC peak to peak).
CLOSED CHANNEL RESISTANCE: (end of relay life)
< 4 ohms
MAXIMUM SWITCHING AND MEASUREMENT SPEED:
300 channels/second
ADJACENT CHANNEL CROSSTALK: (Channels terminated into 50 ohms)
-40 db @ 100KHz
DC ISOLATION:
Channels 0 - 9 (40°C, Relative Humidity 95%) 10° Ohms
Channels 0 - 9 (40°C, 60% Relative Humidity) 10'° Ohms
ISOLATION:
Channels 0 - 9 Closed: 200 pF
Channels 0 - 9 Open: 15 pF
LO to Chassis: 420 pF
44492 operation is not specified for the 30 Ohm range or for frequencies above 100 KHz.
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