HP 3048A Operating Manual page 36

Specifications
Source Output Ports
Four signal sources are built into the HP 11848A that can be
used as low-noise reference sources for your measurements.
The typical amplitude level and tuning range for each of the
HP 11848A's internal sources are shown below.
Typical Amplitude and Tuning Ranges
Source Outputs
10 MHz A
10 MHz B
350-500 MHz
400 MHz
Amplitude
+15 dBm
+6 dBm
+17 dBm
- 5 dBm
Tuning
±100 Hz
±1 kHz
±20 MHz
Fixed Frequency
Getting Started 1-29