HP ESG-D Series, Руководство пользователя

Страница: 648 / 712

7-2
Operation
Framed Data Pattern Transmissions (Options UN3 and UN4)
Framed Data Pattern Transmissions (Options UN3 and UN4)
Signal generators equipped with Options UN3 or UN4 can be configured to
generate framed data transmissions in any of the following formats: DECT, GSM,
NADC, PDC, PHS, or TETRA. Many data patterns can be internally-generated
(PN9, PN15, fixed 4-bit repeating sequences, set patterns of ones and zeroes,
DECT-specific patterns) or you can choose to supply your own data (download a
binary file or input data using the DATA INPUT connector). If you elect to supply
your own data file, it should be created to exactly fill the data fields of your
chosen timeslots. If the end of the file does not coincide with the end of a frame,
data will be truncated in one of the following ways:
• Enough frames will be generated to transmit as much of the data pattern as will fit into
complete frames. The remaining bits of the data pattern (which are too few to
completely fill a frame) are truncated.
• If two files of unequal sizes are selected for the same framed transmission, enough
frames will be generated to transmit as much of the data pattern of the largest file as will
fit into complete frames. The remaining bits of the data pattern are truncated. The
smaller file will be repeated as many times as necessary to completely fill these frames.
Data will be truncated for the smaller file to coincide with the end of the last frame.
• If a user’s file and a PN9 file are selected for the same framed transmission and the
user’s file is shorter than the PN9, 511 frames will be generated to transmit the PN9.
The end of the PN9 data will coincide with the end of the 511th frame. The smaller
user’s file will be repeated as many times as necessary to completely fill these 511
frames. Data will be truncated for the smaller file to coincide with the end of the last
frame.
• If a user’s file and a PN9 file are selected for the same framed transmission and the
user’s file is longer than the PN9, enough frames will be generated to transmit as much
of the data pattern as will fit into complete frames. The remaining bits of the data
pattern (which are too few to completely fill a frame) are truncated. The PN9 data will
be repeated as many times as necessary to completely fill these frames.
The signal generator has the capability of transmitting the framed data
continuously or outputting a single frame. If only one timeslot is on, selecting a
single framed transmission will output the following sequences:
• 4-Bit Patterns (FIX4) - A single frame is generated. The 4-bit pattern repeats until the
data fields are completely filled. Each trigger transmits the same frame.
• Other Patterns (fixed patterns of equal quantities of ones and zeroes) or DECT-Specific
Patterns - A single frame is generated. The selected pattern repeats until the data fields
are completely filled. Each trigger transmits the same frame.