Checks and Adjustments

10.Check L-Band Linearity

REQUIREMENT - One marker per Division ±1 minor Division.

a.Connect the output of the leveled sine wave generator, through the comb generator, to the 1705A L-BAND INPUT. See Figure 5-4.

SG503

1705A

VARIABLE

AUTOTRANSFORMER L-BAND

INPUT

Comb

Generator

Figure 5-4: Equipment connections for L- Band checkout

b.Set the leveled sine wave generator Frequency to 100 MHz, Amplitude Multiplier to X1, and the Amplitude to 1.5 (8 dBm).

c.Set the 1705A INPUT to L-BAND.

d.Set the SPAN/DIV to FULL.

e.CHECK - for 10 frequency markers. (Ignore any sweep start marker.)

f.CHECK – that each marker is within one minor Division of a major graticule line when the 2nd marker is on the first graticule line in from the left. See Figure 5-5.

5- 12

1705A Spectrum Monitor

Page 107
Image 107
Tektronix 1705A instruction manual Variable Autotransformer L-BAND Input