4.5 File Conversion on Convert Screen
4-65
When the MG3700A/MG3710A/MG3710E/MG3740A uses waveform
patterns, the difference between the marker data output timing and the
timing the MG3700A/MG3710A/MG3710E/MG3740A outputs the
modulation data corresponding to the output marker data from the RF
Output connector is adjusted to be within approx. ±1 sample.
Marker Data
Data2
Data1
RF Output
Data3
Data4
I/Q1
I/Q2
I/Q3
I/Q4
±
1 sample
Figure 4.5.6-3 Marker Data and RF Output Timing
■
RF Gate
This data is used to execute pulse modulation for the RF output when
using a Burst wave such as TDMA.
Each signal of this data indicates as follows:
1= RF signal output On
0= RF signal output Off
The RF Gate data is adjusted by the internal delay circuit of the
MG3700A/MG3710A/MG3710E/MG3740A so as to be input to the
internal pulse modulator of the
MG3700A/MG3710A/MG3710E/MG3740A at almost the same time when
the IQ-phase data corresponding to the RF Gate data is input to the
pulse modulator. The pulse modulation timing for the RF output can be
adjusted, therefore, by applying RF Gate = 0 at the same position with
the IQ-phase data where the RF signal is required to be Off.
When the data for both the I and Q phases are set to 0000h and the RF
output is set to Off instead of using this bit (i.e., RF Gate data = 1), the
On/Off power ratio of the RF output signal becomes smaller than that in
the case using the RF Gate data. Therefore, when a larger On/Off power
ratio is required, set the data for both the I and Q phases to 0 and then
set the RF output to Off using the RF Gate data. Note that the sample
for which RF output is set to Off using the RF Gate data is excluded from
RMS value calculation/adjustment when reading input file or generating
waveform pattern file. Refer to Section 4.5.4 “Editing data in Convert
screen” for details.
