Tescom TC-3000C - Page 195

5.7 Reference Guide for using DLL
195
This function provides measurement of the transmitter carrier frequency accuracy at the given TX frequency.
The frequency is RX frequency of a tester The function can be used for the TRM/CA/08/C (Initial Carrier
Frequency Tolerance) test case.
Syntax
unsigned long init_car_freq(unsigned char test_mode, unsigned char freq, unsigned
charhop_mode,unsigned short num_pkts,unsigned char one_mhz_f, short *df0_max, short*df0_min);
Return Value
The return value of this function will be zero if the function is successful. Otherwise, the return value will be
an error code.
Parameter
test_mode // Test Mode. 1:TRANSMITTER_TEST(default), 2:LOOPBACK_TEST
freq // frequency. 0:2402 MHz, 1:2403 MHz, ... , 78:2480 MHz
hop_mode // Hopping 1: OFF, 79: ON(default)
num_pkts // number of packets, Default:10
one_mhz_f // 1MHz filter 0: OFF, 1: ON
df0_max // maximal deviation of carrier frequencies from (2402+'freq') MHz in hundreds Hz
df0_min // minimal deviation of carrier frequencies from (2402+'freq') MHz in hundreds Hz
car_freq_drift
Description
This function provides measurement of the transmitter centre frequency drift within a packet at the given TX
frequency. The frequency is RX frequency of a tester. The function can be used for the TRM/CA/09/C
(Carrier Frequency Drift) test case.
Syntax
unsigned long car_freq_drift(unsigned char test_mode, unsigned char freq, unsigned char
hop_mode,unsigned char pkt_type, unsigned short num_pkts, unsigned charone_mhz_f, unsigned
charmod_1010, unsigned short df2_avg_low_lim, short *f_drift_max, short *drift_rate_max, unsigned short
*df2_avg, unsigned short *df2_min, unsigned short *bytes_2, unsigned short *num_df2_l);
Return Value
The return value of this function will be zero if the function is successful. Otherwise, the return value will be
an error code.
Parameter
test_mode// Test Mode. 1:TRANSMITTER_TEST(default), 2:LOOPBACK_TEST
freq// frequency. 0:2402 MHz, 1:2403 MHz, ... , 78:2480 MHz
hop_mode// Hopping 1: OFF, 79: ON(default)
pkt_type // packet type. 0:Longest(default), 4:DH1, 9:AUX1, 11:DH3, 15:DH5
num_pkts// number of packets, Default:10
one_mhz_f// 1MHz filter 0: OFF, 1: ON
char mod_1010// Flag whether Modulation characteristic for 1010 bit pattern must
// be calculated at the same time
df2_avg_low_lim // lower limit for average of all maximum frequency deviations
// from the average frequency for the 1010 pattern in Hz
// divided by 100 (1unit = 100 Hz). This parameter is meningful only if mod_1010 == 1
f_drift_max // maximal frequency drift in hundreds Hz. The frequency drift
// limits apply to the difference between the average frequency of
// the 4 preamble bits f0 and the average frequency of any 10 bits
// in the payload field of the returned packets fk.
drift_rate_max// maximal drift rate in hundreds Hz per 50 us.
// The maximum drift rate applies to the difference between any two adjacent 10 bit groups
// separated by 50 us within the payload field of the returned packets.
df2_avg // average of all maximum frequency deviations from
// the average frequency for the 1010 pattern in Hz divided by 100. (1unit = 100 Hz)
df2_min // minimum of all maximum frequency deviations from
// the average frequency for the 1010 pattern in Hz divided by 100. (1unit = 100 Hz)