Section I1 Model 683C
Figure 2-10
.
RF OUTPUT
s
1. PULSE Frequency Response: Full band may be swept
Ixto AMPL. MOD. jack is ac coupled. 10 cps to 60 cps, input voltage must be reduced
Input Pulse: + 10 volts or more; 5 milliseconds to avoid overload of power supplies. Refer to
maximum length. chart figure 2-8 for limits at higher modulating
Impedance: 390K shunted by 25 pf. frequencies.
Sensitivity: 29.2 mc/volt at 2 kmc (gc) and
EXT. 8.5 mc/volt at 4 kmc (gc).
Input to AMPL. MOD. jack dc to 300 kc;
-20 volts or more reduces rf level from cw 3. SWEEPOUTPUT
Output: 20-25 volts positive-slope sawtooth,
level to zero. concurrent with rf output.
Impedance: 750K shunted by 25 pf, with diode Internal Impedance: 10K shunted by 20 pf.
CR301 biased off.
4. EXT.TRIG.
2. FREQ. MOD. Input: Positive pulse, 20 volts or more, rise
Input Impedance: ac coupled; 43K shunted by time greater than 3 volts/psec.
approximately 100 pf. Impedance: 10K shunted by 10 pf.
Figure 2- 10. Input and Output Connector Characteristics
2-10 01 130- 1 |
ACEC
