Racal Instruments 2251A Operator's Manual page 22

1.5.9 Gate Out
A TTL compatible signal coincident with the measurement gate is accessible to any
one of the TTLTRGbus lines. The signal is low while the gate is open.
1.5.10 Temperature Performance
Operating Temperature:
Storage Temperature:
1.5.11 Power Requirements
Maximum current required on the power supply lines of the P1 and P2 connectors
on the backplane:
1.5.12 Dimensions
1.5.13 Weight
1.5.14 Options
1.5.14.1 Option 10 External Frequency Standard Multiplier
Phase-locked frequency multiplier enabling 1, 2, 5, or 10 MHz to be used as the
external standard.
Frequency Input:
Signal Level:
Maximum Input Levels:
Input Impedance:
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o
0 C to +50 C
o
-40 C to +70 C
+24V
-24V 110mA
+5V 2.5A
-5.2V 1.6A
10.3"H x 1.188"W x 13.775"D
(Not including ejector handles.)
Approximately 3 lbs.
1, 2, 5, or 10 MHz ±10 ppm
100 mV rms sinewave min., 10V rms
max.
400V peak up to 500 Hz, decreasing to
10V rms at 40 kHz and above.
1 kilohm (nominal) for signals <1V p-
p, decreasing to 500 ohms (nominal)
for signals 10V p-p and above. AC
o
o
150mA
1-13