HP 5335A - Page 30

Operation and Programming
3-82. This allows for slow drift in the signal, but filters out small transients. The SMOOTH
function provides a simple visual way to monitor the stability of a signal. If the stability of the
signal decreases, the LSD's of the display will correspondingly begin to blank out. As stability
increases, the lost digits of resolution will reappear. The SMOOTH key toggles on and off, and
operates independently of all other functions.
NOTE
Because Phase measurements require a steady signal input, the
use of Statistics is not valid (i.e., the STD DEV of a steady
signal should be 0, and MEAN should be the same as any one
measurement). Therefore, the use of STATISTICS for PHASE
measurements is not recommended.
3-83. Input C (Option 030)
3-84. The INPUT C GROUP contains the C Channel Input BNC,
SENSITIVITY control and PREAMP POWER receptacle. The input
connector is a special fused BNC. Refer to paragraph 3-221
for replacement instructions. The SENSITIVITY control varies
the input sensitivity from MAX (10 mV for 150 MHz to 1.0 GHz,
100 mV for 1.0 GHz to 1.3 GHz), refer to Specifications, Table 1-1
to greater than 500 mV. The PREAMP POWER jack allows the use
of an optional high frequency broadband preamplifier, such as
the HP 10855A. The GATE ADJ and GATE MODE controls operate
as with A Channel.
NOTE
The PREAMP POWER jack sup¬
plies a » +15 vdc and a ground
output. This connector will not
support athree-wiretypepower
probe.
3-85. Volts (Option 020)
3-86. The VOLTS section contains the HI (Red) and LO (Black)
input connectors for the fully floating, autoranging Digital
Voltmeter. The voltmeter measures dc inputs up to ±1000 volts.
It automatically selects the ±10V, ±100V, or ±1000V range,
depending on the input voltage. The sensitivity is 100 pV to
100 mV (depending on the range).
3-14