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Power Meter Operation

Setting Measurement Limits

Agilent E4418B User’s Guide 2-45

default values depends on the measurement units in the currently

selected window - see Table 2-6.

The window based limits can also be set to output a TTL logic level at the

rear panel Rmt I/O port when the predefined limits are exceeded. You can

switch the rear panel TTL outputs on or off; set the TTL output level to

active high or low; and determine whether the TTL output represents an

over limit condition, under limit condition or both.

The TTL connector is an RJ-45 series shielded modular jack assembly

with the TTL output pins connected as shown in Figure 2-13.

Table 2-6: Range of Values for Window Limits

Window

Units

Max Min

Default

Max Min

dB +200 dB -180 dB 60 dB -120 dB

dBm +230 dBm -150 dBm 90 dBm -90 dBm

% 999.9 X% 100.0 a% 100.0 M% 100.0 p%

W 100.000 XW 1.000 aW 1.000 MW 1.000 pW

HP4402.book Page 45 Wednesday, November 29, 2000 4:46 PM

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Agilent Technologies 8487D Betriebsanweisung Seite 85