HP 8340b Operating Instructions

Rear Panel BNC Connectors
DESCRIPTION
The electrical characteristics and requirements of the rear panel BNC connectors are listed in this
Figure.
PANEL LAYOUT
0.5V/GHZ
FREQUENCY
STANDARD
SWEEP
OUTPUT
PEN LIFT
OUTPUT
10MHz REF
OUTPUT
NEG Z-AXIS
BLANK BLANK/MKRS
STOP SWP
IN/OUT
EXT TRIGGER
INPUT
8755C
ALT SWP
INTERFACE
FUNCTIONS
0.5V/GHz outputs a voltage that is proportional to the RF output frequency, with a ratio of 0.5 volt
output per 1 GHz RF frequency. Load impedance should be >4 kft. Accuracy is 0.5 V/GHz±1%±2
mV. An output voltage ratio of 1 volts/GHz, to a maximum of 19V, can be achieved by adding two
jumpers on the A28 SYTM board (see Section VIII).
SWEEP OUTPUT is provided by a rear panel BNC connector, and an identical front panel BNC
connector. The output voltage range for this connector is 0 to + 10 volts dc. When the HP 8340B/41B
is sweeping, the SWEEP OUTPUT is 0 Vdc at the beginning of the sweep and +10 Vdc at the end of
the sweep regardless of sweep width. In CW mode, the SWEEP OUTPUT ranges from 0 Vdc at the 10
MHz minimum frequency of the HP 8340B/41B, to 10 Vdc at the 26.5 GHz maximum frequency (20
GHz with HP 8341B), with a proportional voltage for frequencies between 10 MHz - 26.5 GHz (20 GHz
with HP 8341B). Pressing [CW] then [MANUAL] locks the CW frequency but allows a full-range
voltage output from the SWEEP OUTPUT, controlled by the rotary [KNOB] (useful, for example, when
scaling an X-Y recorder). The output impedance at this SWEEP OUTPUT connector is nominally 1 kft.
Figure 3-13 also describes SWEEP OUTPUT.
10 MHz REF OUTPUT provides a 0 dBm, 10 MHz signal derived from the internal frequency standard
of the HP 8340B/41B. Test instruments are connected to this 50 ft BNC connector while the 10 MHz
crystal oscillator is being adjusted (as described in Section V, Adjustments, of this Manual), or this can
be the master clock reference output for a network of instruments.
Figure 3-18. Rear Panel BNC Connectors (1 of 2)
3-42
Operating Information
HP 8340B/4IB

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English