Marconi Instruments 2955 - Page 48

OPERATION
DISTORTION
METER
(RX)
Fig,
3~9
Disicnion
mazer
(RX)
controls and
connectors
(T)
RX key.
Connects
the
signal
generator
output to
RF IN70LT BNC and N sockets
(T)
and
(J}
and
connects
the
distonion
meter
to the
INTtT socket
(t)-
Writes
on
the
screen
information
concernine
instrument
settings.
AF GEN
key.
Enables
the
generator.
(T)
SELECT key
and
LEDs.
For
seiectina
RF
EN/OUT socket
©
or
(i). LED lights-
above
the socket
selected.
(T)
RF IN/OUT
BNC
socket
For
RF
signal
generator
output
levels
up to
225
mV,
Impedance 50 O.
—
- --
-
•
(T)
RF IN/OUT
N
socket.
For
RF
signal
generator output
levels up to
22.5
mV.
Impedance 50 Q,.
(s) ACCESSORY
socket
DIN 7-pin
connector
for
an
e.xiernai
psophometric
(telephone
weighting) CCFTT
or
C^-.MESS
filter option.
(T) DiSTN
ON-“OFF
key.
Causes
the
AF
generator to
modulate
the signal
generator
with
a
1 kHz tone,
(?)
AF
INPUT
socket,
BNC socket for the
AF
input.
3-24
46881-622N
Apr.
88