Tektronix 492, 492P, Руководство по обслуживанию, Страница: 21 / 303

Specification—492/492P Service Vol. I (SN B030000 & up)
Table 1-1 (cont)
Characteristic Performance Requirement Supplemental Information
INPUT SIGNAL CHARACTERISTICS
RF INPUT
Type N female connector, specified to
18 GHz, usable to 21 GHz
Input Impedance 50 ohm; vswr with >10 dB of RF attenuation:
50 kHz-2.5 GHz; 1.3:1 (typically 1.2:1)
2.5-6.0 GHz; 1.7:1 (typically 1.5:1)
6.0-18.0 GHz; 2.3:1 (typically 1.9:1)
18.0-2IGHz; 3.5:1; (typically 2.7:1)
Input Level
Optimum level for linear
operation
-3 0 dBm referenced to input mixer
This is achieved by being in MIN DISTORTION
and not exceeding full screen
1 dB compression point — 18 dBm
No RF attenuation
Maximum input level
RF Attenuation at
+ 13 dBm (Input mixer limit)
OdB
With 20 dB or more
RF Attenuation
+ 30 dBm (1 W) continuous, 75 W
peak, pulse width
1
^s or less with a
maximum duty factor of
0 . 0 0 1
(attenuator limit)
Do Not apply dc voltage to the
RF
INPUT
External Mixer
Input for IF signal and the source of
negative-going bias for external wave­
guide mixers. Bias range +1.0 to -2 .0 V, 70 Ω
source.
EXT IN HORIZ/TRIG
Dc coupled input for horizontal drive
and ac coupled for trigger signal
Input Voltage Range
Sweep
0 to +10 V (dc + peak ac) for full
screen deflection
Trigger 1.0 V peak (minimum).
Frequency 15 Hz to 1 MHz
Maximum input: 50 V (dc + peak ac)
Maximum ac input: 30 V rms to 10 kHz
then derate linearly
to 3.5 V rms @ 100 kHz
and above.
Pulse width 0.1 *zs minimum
ACCESSORY (J104)
This connector is for future applications
OUTPUT SIGNAL CHARACTERISTICS
Calibrator (CAL OUT) -2 0 dBm, ±0.3 dB at 100 MHz,
100 MHz comb markers are provided for
±1.7 kHz
frequency and span calibration
1-10
REV NOV 1982