Keysight Technologies N52 Series User's And Service Manual page 13

Installation & System Operation
TEST IF
IF signal input connection from the millimeter module's Test or Measure IF
Output.
REF IF
Reference IF signal input connection from the millimeter module's Reference IF
Output.
RF OUT
Provides an amplified RF source signal to the millimeter-wave module's RF
Input.
LO OUT
Provides amplified LO signal to the millimeter-wave module's LO Input.
SRC1 and SRC2
Connects to the analyzer's front panel Test Ports for RF Output power.
Port Status LEDs
The amber LEDs indicate which source port is active. The green LEDs indicate
which receiver port is active. All receivers are active in normal operation.
DC Power (Bias)
This bias supplies the +12 Vdc and ground lines for OML millimeter-wave
modules. Pins 1 and 3 are both +12 Vdc supplies. Pins 4 and 6 are the dc
supply ground lines. Pins 2, 5, and 7 are unused. The DC power connections
are intended for use with OML modules.
DC Power/Overcurrent LEDs
The green LEDs indicate that the DC power bias is on. The amber
LEDs indicate an overcurrent condition.
Standby Switch
The switch is only a Standby switch, not a AC line power switch.
Active LED
When the test set is connected and addressed by a analyzer, the LED is On
(illuminated). The LED is Off (not illuminated) when the test set is in Standby,
or not addressed by the analyzer.
The SRC2 Input and Ports 3 and 4 features are not present on the N5261A.
Refer to Figure 1-1 on page 2.
8 Keysight N5261/62A User's & Service Guide