Power Meter Operation

Setting Measurement Limits

default values depends on the measurement units in the currently selected window - see Table 2-6.

Table 2-6: Range of Values for Window Limits

Window

Max

Min

Default

Units

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

 

 

 

 

 

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.

2-48

HP E4419B User’s Guide