J. Freed
Contiuning the work from 84198 this alog is about characterizing the other components of the Double Mixer. D2400315
D2400296 PCB Board transimpedance amp
According to oscilloscope, the signals coming from PCB board are from J2 being cos and J3 being sin. The Vpp are 1.199V on J2 and 1.195V on J3. As before the phase measures are hard to get a read on as the phase measuremnt on the osciloscope says 90deg when I put J3 in the channel 1 position and 91deg when I put J2 in the channel 1 position. Instead I put a 4096 Hz signal generator on Channel 2 then put the of the sin and cos signals on channel 1.
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D2400296 PCB Board transimpedance amp With a 1V from DAC |
Relative Phase (deg)(+- 0.5) | Amplitude (dBm) (+- 0.1) | |
| Cos(J2) | 152.7 | -30.6 | |
| Sin(J3) | -117.7 | -30.6 | |
| Difference | 89.6 +- 0.7 | 0 |
ZLW-1BR Mixer
The mixer data was collected at a range of values incase LO input power needed to be changed, however I would not recomened going below 4dBm LO as the isolation of all the ports falls gets worse the lower the power. The indivitual signals were colected on the Agilent 4396B with a BW of 10 Hz (best one the spectrum analizer allowed without giving an overload notification). While the Total power was given on the E4418A power meter. SRS SG382 was used for the LO power.
| ZLW-1BR RF out power with a 1V IF input | 3dBm LO power | 4dBm LO power | -4dBm LO power | -7dBm LO power |
| At 80 MHz +- 4096Hz (dBm)(+- 0.1dBm) | -4.0 | -3.4 | -10.8 | -13.8 |
| At 80 MHz (dBm)(+- 0.1dBm) | -39.5 | -38.0 | -46.2 | -49.2 |
| Total (dBm)(+- 0.01dBm) | -0.89 | 0.25 | -7.52 | -10.51 |
ZMSC-2-1BR Combiner
The combiner values were colected by using the Agilent 4396B to apply a sweep of values around 80 MHz. All values were the same in about a 10kHz span that was measured
| ZMSC-2-1BR Combiner with -1 dBm on the port | Relative Phase (deg)(+- 0.05) | Power Drop (dB) (+ 0.01) |
| Port 1 | -18.71 | -3.12 |
| Port 2 | -18.65 | -3.11 |
| Difference | 0.06 | 0.01 |
ZMDC-10-1+ Couplier
The couplier was characterized by applying a -1dBm from a SRS SG382 signal generator signal at 80MHz on the input port and reading off from the E4418A power meter. The other port not being measured was terminated. We do not care about relative phase so it was not collected
| ZMDC-10-1+ Couplier Powers at 80MHz | Power with -1dBm on Input (dBm)(+- 0.01) |
| Out | -1.61 |
| Couple | -12.50 |