3GPP Signal Analyzer Measurement Guide : TD‑LTE Signal Analyzer : Setup Menu
 
Setup Menu
Key Sequence: Setup
TD‑LTE Setup Menu
BW: Opens the selectable bandwidth list.
Cyclic Prefix: Press this submenu key to set the instrument to measure signal with a Normal or Extended Cyclic Prefix, or to allow the instrument to detect the Cyclic Prefix automatically.
EVM Max Hold: Turn the EVM Max Hold submenu key On to display both the Maximum EVM value since Reset and the current measured value. This applies to EVM RMS and Peak values. Selecting Off displays only the current measured value.
EVM Mode: Press this key to select either Auto or PBCH Only. Selecting Auto measures PDSCH if data is available, otherwise, it measures PBCH. Selecting PBCH Only forces a PBCH measurement and the constellation measurement will only show QPSK. The instrument will automatically choose PBCH Only mode when the OTA Scanner is used.
Sync: Press this key to open the Sync Menu.
Freq Err Avg Cnt: When the count is greater than one, the frequency error value is averaged over past measurements. If the count is one, then no averaging occurs.
U/D Link Config: Press this key to set the Uplink/Downlink configuration, also known as the Frame Format. Use the keypad, arrow keys, or the rotary knob to set the value between 0 and 6 inclusive. This selection determines which subframes are uplink subframes and which are downlink subframes, and where the transitions between uplink and downlink subframes occur.
Trigger: Press this key to open the Trigger Menu.
Sync Menu
Key Sequence: Setup > Sync
TD‑LTE Sync Menu
Sync Type: Press to choose between the Normal (SS) or RS (Reference Signal) Sync Type. Only choose RS when there is no sync signal present in the transmitter under test. If RS is chosen and a sync signal is present, no modulation measurements will be available.
Cell ID: Identifying information sent by the transmitter in the sync signal. If Normal (SS) is selected as the Sync Type, the Cell ID is extracted automatically from the Sync Signal. The Cell ID must be entered manually when RS Sync Type is selected. For user convenience, the Cell ID is automatically populated from the last measured signal with an SS.
Select noSS Antenna: Select the antenna (1 through 3) in a 4x4 MIMO system that does not receive a sync signal. Antenna 0 must receive a sync signal. This selection is applicable only in RS Sync Type.
Back: Press this submenu key to return to the Setup Menu.
Trigger Menu
Key Sequence: Setup > Trigger
TD‑LTE Sync Menu
Trigger Source: Press this key to choose between No Trig or External (Ext). When Ext is chosen, the instrument uses an external trigger input to determine frame start timing for data acquisition. The internal algorithms will search for a frame sync and use the delta between the external timing reference and internal sync to compute a ‘Timing Error’ measurement.
Trigger Polarity: Select the desired edge of the external trigger source to use for reference.
Back: Press this submenu key to return to the Setup Menu.