This topic describes the parameters of the uplink Project Property setup table, which is accessible when you click Project in the tree view.
Range: for specified range values, see the signal generator's data sheet
This cell sets the carrier frequency on the ESG. This frequency value also appears in the status bar at the bottom of the main window.
Range: for specified range values, see the signal generator's data sheet
This cell sets the carrier amplitude on the ESG. This amplitude value also appears in the Max Power (dBm) field in the Tx Power Control node, and in the status bar at the bottom of the main window.
Choice: Off, On
Default: On
This cell sets the modulation to ON or OFF. ON modulates the carrier with the current software signal parameters.
Choice: Off, On
Default: On
This cell sets the RF output of the ESG to ON or OFF. ON outputs the signal at the ESGs RF OUTPUT connector.
Use this cell to enter a project name for a signal configuration. The alphanumeric text entered in this cell appears in the ESG user interface after the configuration is downloaded to the instrument. The ESG only recognizes configurations that use the following alphanumeric characters:
A through Z
0 through 9
$ & _ # + - [ ]
If unsupported alphanumeric characters appear in a configuration name, the ESG generates a file name not found error (Error: -256) when you download the configuration to the instrument. The maximum length for file names is 8 characters.
Use this cell to enter project comments for a configuration file. If you save the Signal Studio configuration, the information you enter can be useful to anyone using the configuration in the future. This information is not downloaded to the ESG. The maximum length for comments is 32 characters.
Range: 0
Default: 0
This cell sets the uplink scramble code number The scrambling code provides a unique signature for the base station.
Range: 0.240000 to 4.224000 Mcps
Default: 3.840000 Mcps
This cell sets the chip rate (in units of samples). To allow for flexibility in various stages of design verification, the chip rate can be set from .2400 to 4.224 Mcps (1/16 to 11/10 times the rate of the chip clock).
Choice: NORMAL, INVERTED
Default: NORMAL
Use this cell to invert the internal Q signal, reversing the rotation direction of the phase modulation vector.
NORMAL |
The phase relationship between the I and Q signals are not altered by the phase polarity function. |
INVERTED |
This causes the in-phase component (I) to lag the quadrature-phase component (Q) by 90 degrees in the resulting modulation. Inverted phase polarity is required by some radio standards, and it is useful for lower sideband mixing applications. The inverted selection also applies to the I, I-bar, Q, and Q-bar output signals on the ESG. |
Choice: External, Internal
Default: Internal
This cell sets the active source for the baseband generator data clock.
External |
This sets the ESG to use an external data clock as its data clock input. A data clock must be supplied through the DATA CLOCK input connector when external mode is selected. |
Internal |
This sets the instrument to use the internal data clock as its data clock input. |
Choice: X1, X2, X4
Default: X1
This cell sets the external clock rate, which is used to synchronize to the base station (BTS) chip clock. Since the BTS chip clock may be a multiple of 3.84 MHz, the signal generator divides the input rate by the selected multiple to obtain the 3.84 MHz chip clock.
X1 |
3.84 MHz external clock |
X2 |
7.68 MHz external clock (2x the rate of the chip clock) |
X4 |
15.36 MHz external clock (4x the rate of the chip clock) |
Choice: Root Nyquist, Nyquist, Gaussian,
Rectangle, IS95, IS95 w/EQ, IS95 Mod, IS95 Mod w/EQ, APCO 25 C4FM, UN
3/4 GSM Gaussian, User
Default: Root Nyquist
This cell sets the baseband filter type. When you click the cell, a drop-down arrow provides access to the filter Data Type Entry window where you can select from a variety of filters or you can select USER, which activates the USER FIR Editor, enabling you to configure or import a custom FIR filter.
Range: 0
Default: 0.22
This cell sets the filter's alpha value. It is only valid for Nyquist filters. It is only valid for root Nyquist and Nyquist filters.
Range: 0
Default: 0.5
This cell sets the filter's BbT value. It is only valid for a Gaussian filter.
Choice: EVM, ACP
Default: EVM
This cell optimizes the selected filter for improved EVM or ACP. It is only valid for root Nyquist and Nyquist filters.
Range: 10, 20, 40, 80, 2560
Default: 80
This cell sets the frame clock interval for the synchronization signal. When using the frame clock, choose an interval that is equal to or longer than that of the longest transport channel TTI period.
Choice: Positive, Negative
Default: Positive
This cell sets the polarity of the frame clock signal.
Negative |
The signal generator frame clock timing uses the falling edge of the frame clock signal. |
Positive |
The signal generator frame clock timing uses the rising edge of the frame clock signal. |
Range: 0
Default: 0
This cell sets the SFN-CFN frame offset. This offset adds a delay to the frame counter by specifying the starting frame number. Frame 0 starts with the system sync trigger reset signal when the frame offset is set to zero. For example, if the frame offset is set to two, the signal generator counter starts 2 frames after the system sync trigger.
Range: 0
Default: 0
This cell sets the number of timeslots to delay the DPCH from the synchronization source.
Range:
Default: 0
This cell sets the timing offset between the DPCH (DPDCH and DPCCH) and the HS-DPCCH.
Choice: Positive, Negative
Default: Positive
This cell sets the polarity of the SFN reset signal for uplink synchronization.
Negative |
The signal generator responds to a falling edge reset signal. |
Positive |
The signal generator responds to a rising edge reset signal. |
Choice: Single, Continuous
Default: Single
This cell sets the frame synchronization trigger mode.
Single |
The signal generator generates frames based on the reference clock. |
Continuous |
The signal generator continuously aligns the sync signal with frame timing. |
Choice: SFN_ RST, FrameClock
Default: FrameClock
This cell sets the frame synchronization source.
SFN_RST |
The system frame number reset signal is the synchronization source. |
FrameClock |
The frame clock signal is the synchronization source. |