added pass through s11

data_acq_and_processing/processing/data_processor/include/processing_live_config.hpp

@@ -18,6 +18,7 @@ struct ProcessingLiveConfig {
     std::string processor_mode = "pass_through";
     float gain_db = 0.0F;
     float phase_deg = 0.0F;
+    std::string pass_through_channel = "s21";
     bool pass_through_fixed_y_enabled = false;
     float pass_through_y_min_db = -100.0F;
     float pass_through_y_max_db = 0.0F;

data_acq_and_processing/processing/data_processor/src/processing_live_config.cpp

@@ -30,6 +30,13 @@ using Json = nlohmann::json;
     throw std::runtime_error("processing.history_command must be one of: none, remove_last, clear_all");
 }
 
+[[nodiscard]] auto parse_pass_through_channel(const std::string& value) -> std::string {
+    if (value == "s21" || value == "s11") {
+        return value;
+    }
+    throw std::runtime_error("processing.pass_through_channel must be one of: s21, s11");
+}
+
 [[nodiscard]] auto parse_u64_number(const Json& value, const std::string& field_name) -> std::uint64_t {
     if (!value.is_number()) {
         throw std::runtime_error(field_name + " must be number");
@@ -101,6 +108,12 @@ using Json = nlohmann::json;
         }
         config.phase_deg = static_cast<float>(found->get<double>());
     }
+    if (const auto found = root.find("pass_through_channel"); found != root.end()) {
+        if (!found->is_string()) {
+            throw std::runtime_error("processing.pass_through_channel must be string");
+        }
+        config.pass_through_channel = parse_pass_through_channel(found->get<std::string>());
+    }
     if (const auto found = root.find("pass_through_fixed_y_enabled"); found != root.end()) {
         if (!found->is_boolean()) {
             throw std::runtime_error("processing.pass_through_fixed_y_enabled must be bool");

data_acq_and_processing/processing/processors/src/passthrough_processor.cpp

@@ -29,7 +29,11 @@ auto PassThroughProcessor::process_collection(
         payload.processing_name = name();
         payload.kind = ipc::ResultKind::TraceComplex;
         payload.frequency_hz = trace.frequency_hz;
-        payload.trace = trace.s21;
+        if (live_config.pass_through_channel == "s11") {
+            payload.trace = trace.s11;
+        } else {
+            payload.trace = trace.s21;
+        }
 
         const float linear_gain = std::pow(10.0F, live_config.gain_db / 20.0F);
         const float phase_rad = live_config.phase_deg * (kPi / 180.0F);