HP 5305 B - 3-11. 1300 Mhz Channel Input Levels

Model 5305B
Operation
9E-3-11. 1300 MHz Channel Input Levels
voltage, power, and dBm. This scale applies to a 50-ohm
system and is not applicable to the 100 MHz channel. The
shaded area represents the specified operating range of the
1300 MHz channel.
9E-3-12. The 1300 MHz channel is a 50-ohm system with a
maximum input of 5V rms. Figure 9E-3-1 provides a
conversion scale for determinin
g
respective levels of
Figure 9E-3-2. Front Panel Controls, Connectors, and Indicators
N
OTE
The "S" annunciator on the 5300 lights during the high-resolution mode wheneve
r
the input is beyond the proper frequency range, or too weak to measure, or during
ac
q
uisition followin
g
si
g
nal interru
p
tion.
1.
90 MHz - 1300 MHz Input Jack. With RANGE
switch set to A, accepts input frequencies from 90
MHz to 1300 MHz. Input sensitivity is 20mV. 50
ohm input impedance and ac coupled. Maximu
m
input is 5V rms. Fuse is located inside jack. Use
a
BNC connector as a wrench to remove and tighten
the fuse jack. Replacement HP part number for fuse
is 2110-0301.
accepts input frequencies from 50 Hz to 100 MHz.
With RANGE set to B HIGH RESOLUTION,
accepts frequencies up to 10 kHz. Input sensitivity
is 20 mV rms. Input impedance is 1 Megohm
shunted b
y
less than 40 pF. Channel is ac coupled.
5.
RANGE switch. Allows selection of either of the
two input channels or the self-check mode. In the
CHK position, allows system to count the internal
10 MHz clock signal. Measurement is not affecte
d
by
si
g
nals connected to the input
j
acks.
2.
ATTENUATOR Control. Provides manual control
of input attenuator circuit for 1300 MHz channel.
MIN position provides minimum signal attenuation.
MAX position provides maximum attenuation.
AGC circuit
g
ives >47 dB d
y
namic ran
g
e.
6.
RESOLUTION Switch. The counter's leas
t
-
significant digit displays the measured resolution o
f
the input signal that is selected with the switch. Fo
r
example, 10 Hz selected with 6,789 Hz inpu
t
frequenc
y
: counter displa
y
s 6.78 kHz.
3.
PREAMP POWER. Supplies + 15V @ ≈ 40 mA to
p
ower 10855A Preamplifier.
4. 100 MHz Input Jack. When RANGE is set to B,
9E-3-2