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ESG Family Signal Generators Assembly-Level Troubleshooting with Block Diagrams
A9 Output ABUS Nodes (ESG-AP, & ESG-DP Series)
Service Guide 2-25
A9 Output ABUS Nodes
(ESG-AP, & ESG-DP Series)
NOTE The node voltages given in the following table are approximate values based
on a sample of signal generators. Your signal generator may not reflect these
exact values. Additionally, the resolution of these values varies from node to
node. As a guideline, interpret your measurements based on the number of
decimal places shown for the expected voltage.
A9 Output ABUS Nodes (ESG-AP & ESG-DP Series) (1 of 2)
A9 Output ABUS Nodes (ESG-AP & ESG-DP Series) (2 of 2)
Test
Conditions
Node Voltages (Corrected Values in Vdc)
ALC_MOD
BURST_MOD
ALC_DET
POW_REF_1
POW_REF_2
LOOP_INT
PTAT
PRESET;
0 dBm; RF On;
No Modulation;
50 Ω load on
output
≈ 0.2 to 2
a
a. These values will be > 10 V if ALC is unleveled.
≈ 0.5 to 5 at
≤ 2.4 GHz;
≤20 at
4 GHz
−0.3 3.5 4.2
≈−2 to 2
a
(varies w/
freq)
9.5
(8.5 to 9.9)
Test
Conditions
Node Voltages (Corrected Values in Vdc)
I
Q
PRE_LEVEL
QUAD
GAIN_DET
GND
REF_AM
PRESET;
0 dBm; RF On;
No Modulation;
50 Ω load on
output
1.9 0 ≈ −2 to 12
(varies w/
freq)
0.7 −0.35 to
0.02 at
≤ 2.4 GHz;
0.1 to 0.7 at
> 2.4 GHz
0 ≈ 0.6
(varies w/
freq &
power
level)