HP 5305 B Operating And Service Manual page 8

INPUT CHANNEL A (CW OR BURST)
Range: 90 MHz to 1300 MHz, prescaled by 16
Sensitivity: 20 mV rms
Impedance: 50Ω
Attenuator: Continuously variable to give optimum
noise suppression for signals up to 3.5V rms.
Overload Protection: 5V rms, maximum. Input cir-
cuitry is fuse protected; fuse is located in BNC
connector and is accessible from the front panel.
Operating Dynamic Range: > 47 dB
INPUT CHANNEL B (NORMAL AND HIGH
RESOLUTION MODE)
Range: 50 Hz to 100 MHz, direct count in normal
mode. 50 Hz to 10 kHz in high resolution mode. In
the high resolution mode, the 5305B uses a phase-
locked multiplier to increase resolution X1000 over
normal measurement resolution.
Sensitivity: 20 mV rms
Impedance: 1 MΩ shunted by less than 40 pF.
Overload Protection: 250V rms from 50 Hz to 10
kHz, declining to 10V rms above 10 MHz.
Search Indicator: In high-resolution mode the "S"
annunciator is lit whenever the input is beyond the
proper frequency range, or too weak to measure, or
during the brief acquisition time following signal
interruption.
Automatic Hold: In high-resolution mode, the last
valid reading is held in display when input is
terminated.
Table 9E-1-1. Specifications
RESOLUTION (SELECTABLE):
Normal Mode (50 Hz to 1300 MHz): 0.1 Hz to
10000 Hz in decade steps corresponding to gate times
of 10 sec to 0.0001 sec in decade steps on channel B
and to gate times of 160 s to .0016 s in decade steps on
channel A.
High Resolution Mode (50 Hz to 10 kHz): 0.0001,
0.001, 0.01, 0.1, 1, 10 Hz corresponding to 10, 1, 0.1,
0.01, 0.001, 0.0001 second gate times on channel B.
Accuracy: ±1 digit displayed ± time base accuracy.
Display: Hz, kHz, MHz with positioned decimal point.
GENERAL
Check: Counts internal 10 MHz reference frequency
to check counting circuits.
Operating Temperature: 0° to 50°C.
Power Requirements: Nominally 12 watts including
mainframe.
Weight: Net 1.0 kg (2-1/4 lbs.); Shipping 1.8 kg (4 lbs.)
Dimensions: With mainframe, 89 mm H (3-1/2")x 160
mm W (6-1/4") x 248 mm L (9-3/4").
Compatible Mainframes: 5300A (6 digits) or 5300B
(8 digits). 5300B is recommended.
Accessories: 10855A Preamp (22 dB gain).
FREQUENCY MEASUREMENT
Model
5305B General
9E-1-3